Comparison of voxel terrain solutions for Unity

There are several voxel solutions available for Unity now and it can be hard to keep track of them.

I've created a post on Unity Answers here to attempt to make it easy to compare them all.

Did I miss any solutions? (Note that I specify some criteria for inclusion in the question.)
Are there any other properties to compare you'd like to have included?

I've set question and answer...

Comparison of voxel terrain solutions for Unity